Perhaps you should try some spelling variations:
"central basic research scholars series." » "central basic research scholarship series.", "central basic research schools series.", "central basic research scholars soldiers.", "central based research scholars series.", "central bajio research scholars series.", "neutral basic research scholars series.", "central bank research scholars series."
"central asia's research firm surveys." » "central asia research firm surveys.", "central africa's research firm surveys.", "central animals research firm surveys.", "central asian research firm surveys.", "central america's research firm surveys.", "central asia's research from surveys.", "central asia's research field surveys.", "central asia's research final surveys.", "central asia's research firm survey."

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: (("central basic research scholars series.") or ("central asia's research firm surveys."))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: (("central basic research scholars series.") OR ("central asia's research firm surveys.")).
• Removing quotes may allow a broader search: (( central basic research scholars series. ) or ( central asia's research firm surveys. )).
• Adding a wildcard symbol may retrieve word variants: (("central basic research scholars series.") or ("central asia's research firm surveys."))*.